/ 2\ | -2 - 2*x + 4*x | lim |-1 + ---------------| x->1+| 2 | \ x /
Limit(-1 + (-2 - 2*x + 4*x^2)/x^2, x, 1)
/ 2\ | -2 - 2*x + 4*x | lim |-1 + ---------------| x->1+| 2 | \ x /
-1
= -1
/ 2\ | -2 - 2*x + 4*x | lim |-1 + ---------------| x->1-| 2 | \ x /
-1
= -1
= -1